Antenna insulator



FIG. 1 is a front, bottom, right side perspective view of an antenna insulator showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof; the front elevational view being identical to FIG. 4; and,

FIG. 5 is a left side elevational view thereof, the right side elevational view being identical to FIG. 5. 

The ornamental design for an antenna insulator, as shown and described. 